The problem with time travel is that you can't travel to a place where you don't exist.
时间旅行的难题在于,你无法前往自己不存在的地方。
The power of mathematics is in its abstraction, allowing us to see patterns and connections that are not immediately obvious.
企业要发展,必须要有创新精神,不断推陈出新。
Risk more than others think is safe. Dream more than others think is practical.